Influence of ammonia on membrane-electrode assemblies in polymer electrolyte fuel cells

被引：49
|
作者：
Zhang, Xiaoyu [1 ,2 ]
Pasaogullari, Ugur [1 ,2 ]
Molter, Trent [2 ]
机构：
[1] Univ Connecticut, Dept Mech Engn, Unit 3139, Storrs, CT 06269 USA
[2] Univ Connecticut, Connecticut Global Fuel Cell Ctr, Unit 5233, Storrs, CT 06269 USA
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 22期
基金：
美国国家科学基金会;
关键词：
PEFC; Ammonia; Contamination; Cyclic voltammetry; Electrochemical impedance spectroscopy; CYCLIC VOLTAMMETRY; PERFORMANCE; HYDROGEN; DEMS;
D O I：
10.1016/j.ijhydene.2009.08.099
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
An experimental investigation of contamination of polymer electrolyte fuel cell (PEFC) membranes and catalyst layers with ammonia (NH3) is reported. Cyclic voltammetry (CV) scans and electrochemical impedance spectroscopy (EIS) analyses show that trace amounts of ammonia can significantly contaminate both the polymer electrolyte membrane (PEM) and the catalyst layers. The results show that the catalyst layer contamination can be reversed under certain conditions, while the membrane recovery tends to be much slower, and permanent effects of ammonia contamination is observed. Mechanisms of contamination of the polymer electrolyte and catalyst layers, and performance degradation of the PEFC are also postulated. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：9188 / 9194
页数：7
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